Can end with bonded seal slides

ABSTRACT

A can end is provided with an opening and a can end sealing portion. A slide is disposed against the can end adjacent the opening. A stationary member is disposed against the slide and is provided with a pour opening and a stationary member sealing portion. The slide has a slide sealing portion adjacent the pour opening and is movable to a sealing position where the pour opening is covered by the slide. The pull tab has a connection to the slide. Engaging means engage the can end and one of the slide and the stationary member to position the stationary member sealing portion adjacent the can end sealing portion, and to press the slide sealing portion against the stationary member adjacent the pour opening. A pressure barrier material seals the can end sealing portion to the stationary member sealing portion and the slide sealing portion to the stationary member adjacent the pour opening. The pressure barrier material is bonded to the stationary member adjacent the pour opening with a first predetermined shear strength and to the slide sealing portion with a second predetermined shear strength less than the first predetermined shear strength. The pull tab is movable to cause the slide to move away from the sealing position to break the bond between the slide sealing portion and the pressure barrier material adjacent the pour opening. The pull tab then is movable to cause the slide to uncover the pour opening.

United States Patent Douty [451 Dec. 5, 1972 [54] CAN END WITH BONDED SEAL SLIDES [57] ABSTRACT lnventofl Dolllld 'Yi Franklin A can end is provided with an opening and a can end Township, westmoreland C unty, sealing portion. A slide is disposed against the can end adjacent the opening. A stationary member is disposed [73] Assignee: United States steel Corporation against the slide and is provided with a pour opening and a stationary member sealing portion. The slide has [22] Filed: 1971 a slide sealing portion adjacent the pour opening and [21] Appl 221,600 is movable to a sealing position where the pour opening is covered by the slide. The pull tab has a connec- Rflfled Applicaliml Data tion to the slide. Engaging means engage the can end [62] Division of Set. No. 146,945, May 26, l97l,which is 9" f the 9'' and f a division of Set. No. 61,384, Aug. 5, 1970, Pat. No. Posmon the statlonary member Sealmg Portion 3,622,055. jacent the can end sealing portion, and to press the slide sealing portion against the stationary member ad- [52] US. Cl. ..222/484, 222/541, 220/41, jacent the pour opening. A pressure barrier material 220/53 seals the can end sealing portion to the stationary [51] Int. Cl. ..B65d 47/10 member sealing portion and the slide sealing portion 1 Field of Search to the stationary member adjacent the pour opening.

222/153;220/41,47i 53, 54, 46; 229/7 The pressure barrier material is bonded to the sta- SC tionary member adjacent the pour opening with a first predetermined shear strength and to the slide sealing References Cited portion with a second predetermined shear strength UNITED STATES PATENTS less than the first predetermined shear strength. The pull tab is movable to cause the slide to move away 2,629,534 2/1953 Reynolds ..229/7 SC from thg ealing position to break the bond between 3,250,436 /1966 KUI'IZ the lide sealing portion and the pressure barrier 3,308,986 3/l967 Balocca et a]. ..220/53 t i l djacent the pour opening. The pull tab then 3,363,798 H1968 Garangiotis ..220/4l is movable to cause the Slide to uncover the pour opening. Primary Examiner-Stanley H. Tollberg Attorney-Robert .l. Leek, Jr. 41 Claims, 68 Drawing Figures 2a 9622 Z 22 IO 22 22 I I4 lJl/l/[A 11 fl 1 9'; I 34 35 22 9422 i 22 22 PATENTED DEC 5 I972 sum 01 or 3 PATENTEDum 5 m2 SHEET OZUF 34 PATENTED DEC 5 I972 SHEET OSUF 34 PATENTEDHE 5197? 3,704,818

SHEET U8UF 34 PATENTEDHEB 51912 SHEET 080F134 FIG. 80

FIG. 8E

PATENTED E 5 I972 sum 10 0F 3 PATENTED DEC 5 I972 SHEET 12UF 34 PAIENTED E 5W2 3.704.818

SHEET 130E 34 C FIG. IZA

PATENTEDUEC 5 1972 3,704,818

SHEET 1B0! 34 PATENTEDB B 5'97? 3.704.818

sum 18UF 34 PATENTEDBEB 5 SHEET 1901" 34 

1. In combination: a. a can end provided with an opening and a can end sealing portion, b. a slide disposed against said can end adjacent said opening, c. a stationary member disposed against said slide and provided with a pour opening and a stationary member sealing portion, d. said slide having a slide sealing portion adjacent said pour opening and being movable to a sealing position where said pour opening is covered by said slide, e. a pull tab having a connection to said slide, f. engaging means engaging said can end and one of said slide and said stationary member to position said stationary member sealing portion adjacent said can end sealing portion, and to press said slide sealing portion against said stationary member adjacent said pour opening, g. a pressure barrier material for sealing said can end sealing portion to said stationary member sealing portion and said slide sealing portion to said stationary member adjacent said pour opening,
 1. said pressure barrier material being bonded to the stationary member adjacent said pour opening with a first predetermined shear strength and to said slide sealing portion with a second predetermined shear strength less than said first predetermined shear strength, h. said pull tab being movable to cause said slide to move away from said sealing position to break the bond between said slide sealing portion and said pressure barrier material adjacent said pour opening, and i. said pull tab then being movable to cause said slide to uncover said pour opening.
 2. The combination recited in claim 1 wherein said slide has a bulge strength measured in lbs./sq. inch equal to or greater than the bulge strength of said can end.
 3. The combination recited in claim 1 wherein said engaging means has a stationary member supporting one member of said stationary member, said slide and said can end and a movable member engaging another member of said stationary member, said slide and said can end.
 4. The combination recited in claim 1 wherein said engaging means is said pull tab engaging said can end.
 5. The combination recited in claim 1 wherein said engaging means is magnetic.
 6. The combination recited in claim 1 wherein said pull tab is integral with said slide.
 7. The combination recited in claim 1 wherein said connection is integral with one of said pull tab and said slide.
 8. The combination recited in claim 1 wherein said connection is separate from either said pull tab or said slide.
 9. The combination recited in claim 1 wherein said connection is a weld.
 10. The combination recited in claim 1 wherein said connection is an adhesive.
 11. The combination recited in claim 1 wherein said pour opening is radial.
 12. The combination recited in claim 1 wherein said pour opening is chordal.
 13. The combination recited in claim 1 wherein said can end has an opening embossment around said opening.
 14. The combination recited in claim 13 wherein said embossment is upward.
 15. The combination recited in claim 13 wherein said embossment is downward for vacuum sealing.
 16. The combination recited in claim 1 wherein said slide has a locking tab for engaging said can end.
 17. The combination recited in claim 1 wherein said pour opening has substantially straight sides.
 18. The combination recited in claim 1 wherein said pour opening has arcuate sides.
 19. The combination recited in claim 1 wherein said pull tab is of the corrugated type.
 20. The combination recited in claim 1 wherein said pull tab is of the ring type.
 21. The combination recited in claim 1 wherein said pull tab is of the serrated type.
 22. THe combination recited in claim 1 wherein said pull tab is of the projecting type.
 23. The combination recited in claim 1 wherein said pull tab is of the waffle type.
 24. The combination recited in claim 1 wherein said pull tab has a plurality of protuberances.
 25. The combination recited in claim 1 wherein said pull tab has a plurality of cavities.
 26. The combination recited in claim 1 wherein said stationary member is provided with a vent aperture, said pressure barrier material being adapted to seal said stationary member adjacent vent aperture to said slide with said second predetermined shear strength, said slide being operable during the slide movement away from said sealing position to break the bond between said stationary member adjacent vent aperture, and said slide then being operable to uncover said vent aperture.
 27. The combination recited in claim 1 and having stop means on either said slide or said can end for limiting movement of said slide.
 28. The combination recited in claim 26 wherein said vent aperture is radial.
 29. The combination recited in claim 26 wherein said vent aperture is chordal.
 30. The combination recited in claim 26 wherein said vent aperture has substantially straight sides.
 31. The combination recited in claim 26 wherein said vent aperture has arcuate sides.
 32. The combination recited in claim 1 wherein said pull tab is of the expansion type.
 33. The combination recited in claim 1 wherein said pull tab has a plane of weakness.
 34. The combination recited in claim 33 wherein said vent aperture is disposed in the outboard side of said plane of weakness.
 35. The combination recited in claim 33 wherein said vent aperture is disposed in the outboard side of said plane of weakness.
 36. The combination recited in claim 1 wherein said slide is linear.
 37. The combination recited in claim 1 wherein said slide is oscillatable.
 38. The combination recited in claim 1 wherein said slide is of the linear type and said slide is provided with another pour opening, said slide being operable after the bond breaking operation to cause said other pour opening in said slide to open said pour opening in said stationary member.
 39. The combination recited in claim 38 wherein said pull tab engages said can end to press said can end and said slide sealing portion against said stationary member sealing portion.
 40. The combination recited in claim 38 wherein said slide is provided with a dish portion which functions as a pour lip when said slide is in the pour opening uncovering position.
 41. The combination recited in claim 38 wherein said stationary member is provided with a vent aperture and said slide is adapted to cover said vent aperture when said slide is in said sealing position, said pressure barrier material being adapted to seal said stationary member adjacent said vent aperture to said slide with said second predetermined shear strength, said slide being operable during said slide movement away from said sealing position to break the bond between said stationary member adjacent said vent aperture and said slide. 